Cosmetic brush



FIG. 1 is a top-front-left perspective view of a cosmetic brush showingmy new design;

FIG. 2 is a bottom-rear-right perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a detail view of area 9 in FIG. 1; and,

FIG. 10 is a detail view of area 10 in FIG. 2.

CLAIM The ornamental design for a cosmetic brush, as shown anddescribed.